155238872 has 16 divisors (see below), whose sum is σ = 293002800. Its totient is φ = 77104800.

The previous prime is 155238859. The next prime is 155238887. The reversal of 155238872 is 278832551.

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, 63047 + ... + 65462.

It is an arithmetic number, because the mean of its divisors is an integer number (18312675).

Almost surely, 2^155238872 is an apocalyptic number.

It is an amenable number.

155238872 is a deficient number, since it is larger than the sum of its proper divisors (137763928).

155238872 is a wasteful number, since it uses less digits than its factorization.

155238872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128666 (or 128662 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 155238872 is about 12459.4892351171. The cubic root of 155238872 is about 537.4443390713. Note that the first 3 decimals are identical.

The spelling of 155238872 in words is "one hundred fifty-five million, two hundred thirty-eight thousand, eight hundred seventy-two".