155438236 has 12 divisors (see below), whose sum is σ = 272260912. Its totient is φ = 77649408.

The previous prime is 155438203. The next prime is 155438237. The reversal of 155438236 is 632834551.

It is a super-2 number, since 2×155438236² = 48322090421583392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155438195 and 155438204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155438237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12240 + ... + 21463.

Almost surely, 2^155438236 is an apocalyptic number.

It is an amenable number.

155438236 is a deficient number, since it is larger than the sum of its proper divisors (116822676).

155438236 is a wasteful number, since it uses less digits than its factorization.

155438236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34860 (or 34858 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 155438236 is about 12467.4871566006. The cubic root of 155438236 is about 537.6743098619.

The spelling of 155438236 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, two hundred thirty-six".