153994428 has 72 divisors (see below), whose sum is σ = 446191200. Its totient is φ = 43868160.

The previous prime is 153994427. The next prime is 153994433. The reversal of 153994428 is 824499351.

153994428 is a `hidden beast` number, since 1 + 539 + 94 + 4 + 28 = 666.

153994428 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153994427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112468 + ... + 113828.

It is an arithmetic number, because the mean of its divisors is an integer number (6197100).

Almost surely, 2^153994428 is an apocalyptic number.

153994428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 153994428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223095600).

153994428 is an abundant number, since it is smaller than the sum of its proper divisors (292196772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

153994428 is a wasteful number, since it uses less digits than its factorization.

153994428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827 (or 1822 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 153994428 is about 12409.4491416823. The cubic root of 153994428 is about 536.0043764030.

The spelling of 153994428 in words is "one hundred fifty-three million, nine hundred ninety-four thousand, four hundred twenty-eight".