155978268 has 24 divisors (see below), whose sum is σ = 372827280. Its totient is φ = 50724480.

The previous prime is 155978261. The next prime is 155978279. The reversal of 155978268 is 862879551.

It is a self number, because there is not a number n which added to its sum of digits gives 155978268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155978261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158023 + ... + 159006.

It is an arithmetic number, because the mean of its divisors is an integer number (15534470).

Almost surely, 2^155978268 is an apocalyptic number.

It is an amenable number.

155978268 is an abundant number, since it is smaller than the sum of its proper divisors (216849012).

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

155978268 is a wasteful number, since it uses less digits than its factorization.

155978268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317077 (or 317075 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 51.

The square root of 155978268 is about 12489.1259902365. The cubic root of 155978268 is about 538.2962626170.

The spelling of 155978268 in words is "one hundred fifty-five million, nine hundred seventy-eight thousand, two hundred sixty-eight".