155439472 has 20 divisors (see below), whose sum is σ = 301432096. Its totient is φ = 77650560.

The previous prime is 155439469. The next prime is 155439499. The reversal of 155439472 is 274934551.

It is a happy number.

It is a super-2 number, since 2×155439472² = 48322858911277568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17572 + ... + 24892.

Almost surely, 2^155439472 is an apocalyptic number.

It is an amenable number.

155439472 is a deficient number, since it is larger than the sum of its proper divisors (145992624).

155439472 is a wasteful number, since it uses less digits than its factorization.

155439472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8656 (or 8650 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 155439472 is about 12467.5367254322. The cubic root of 155439472 is about 537.6757350018.

The spelling of 155439472 in words is "one hundred fifty-five million, four hundred thirty-nine thousand, four hundred seventy-two".