194872428 has 36 divisors (see below), whose sum is σ = 521571960. Its totient is φ = 61136256.

The previous prime is 194872427. The next prime is 194872429. The reversal of 194872428 is 824278491.

194872428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (194872427) and next prime (194872429).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (194872421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158598 + ... + 159821.

It is an arithmetic number, because the mean of its divisors is an integer number (14488110).

Almost surely, 2^194872428 is an apocalyptic number.

194872428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

194872428 is an abundant number, since it is smaller than the sum of its proper divisors (326699532).

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

194872428 is a wasteful number, since it uses less digits than its factorization.

194872428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318446 (or 318441 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 194872428 is about 13959.6714861060. The cubic root of 194872428 is about 579.7625147431.

The spelling of 194872428 in words is "one hundred ninety-four million, eight hundred seventy-two thousand, four hundred twenty-eight".