153549990 has 96 divisors (see below), whose sum is σ = 445775616. Its totient is φ = 36348480.

The previous prime is 153549989. The next prime is 153550073. The reversal of 153549990 is 99945351.

It is a happy number.

153549990 is a `hidden beast` number, since 15 + 3 + 549 + 9 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40767 + ... + 44373.

It is an arithmetic number, because the mean of its divisors is an integer number (4643496).

Almost surely, 2^153549990 is an apocalyptic number.

153549990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 153549990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222887808).

153549990 is an abundant number, since it is smaller than the sum of its proper divisors (292225626).

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

153549990 is a wasteful number, since it uses less digits than its factorization.

153549990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674 (or 3671 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 153549990 is about 12391.5289613510. The cubic root of 153549990 is about 535.4882316354.

The spelling of 153549990 in words is "one hundred fifty-three million, five hundred forty-nine thousand, nine hundred ninety".