155973240 has 48 divisors (see below), whose sum is σ = 506914200. Its totient is φ = 41592768.

The previous prime is 155973217. The next prime is 155973247. The reversal of 155973240 is 42379551.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 155973195 and 155973204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155973247) 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, 216270 + ... + 216989.

Almost surely, 2^155973240 is an apocalyptic number.

155973240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155973240 is an abundant number, since it is smaller than the sum of its proper divisors (350940960).

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

155973240 is a wasteful number, since it uses less digits than its factorization.

155973240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433276 (or 433269 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 155973240 is about 12488.9246935034. The cubic root of 155973240 is about 538.2904785149.

The spelling of 155973240 in words is "one hundred fifty-five million, nine hundred seventy-three thousand, two hundred forty".