155378628 has 96 divisors (see below), whose sum is σ = 414691200. Its totient is φ = 50295168.

The previous prime is 155378627. The next prime is 155378711. The reversal of 155378628 is 826873551.

155378628 is a `hidden beast` number, since 1 + 553 + 78 + 6 + 28 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (155378621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 788626 + ... + 788822.

It is an arithmetic number, because the mean of its divisors is an integer number (4319700).

Almost surely, 2^155378628 is an apocalyptic number.

155378628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155378628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207345600).

155378628 is an abundant number, since it is smaller than the sum of its proper divisors (259312572).

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

155378628 is a wasteful number, since it uses less digits than its factorization.

155378628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 378 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 155378628 is about 12465.0963895190. The cubic root of 155378628 is about 537.6055713310.

The spelling of 155378628 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, six hundred twenty-eight".