155378388 has 96 divisors (see below), whose sum is σ = 409328640. Its totient is φ = 45472000.

The previous prime is 155378387. The next prime is 155378401. The reversal of 155378388 is 883873551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155378387) 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, 552808 + ... + 553088.

It is an arithmetic number, because the mean of its divisors is an integer number (4263840).

Almost surely, 2^155378388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155378388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204664320).

155378388 is an abundant number, since it is smaller than the sum of its proper divisors (253950252).

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

155378388 is a wasteful number, since it uses less digits than its factorization.

155378388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 427 counting only the distinct ones).

The product of its digits is 806400, while the sum is 48.

The square root of 155378388 is about 12465.0867626343. The cubic root of 155378388 is about 537.6052945331.

The spelling of 155378388 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, three hundred eighty-eight".