155772260 has 96 divisors (see below), whose sum is σ = 397098240. Its totient is φ = 50139648.

The previous prime is 155772259. The next prime is 155772269. The reversal of 155772260 is 62277551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 155772260.

It is not an unprimeable number, because it can be changed into a prime (155772269) 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, 417434 + ... + 417806.

It is an arithmetic number, because the mean of its divisors is an integer number (4136440).

Almost surely, 2^155772260 is an apocalyptic number.

155772260 is a gapful number since it is divisible by the number (10) 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 155772260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198549120).

155772260 is an abundant number, since it is smaller than the sum of its proper divisors (241325980).

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

155772260 is a wasteful number, since it uses less digits than its factorization.

155772260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 155772260 is about 12480.8757705539. The cubic root of 155772260 is about 538.0591736206.

155772260 divided by its sum of digits (35) gives a triangular number (4450636 = T₂₉₈₃).

The spelling of 155772260 in words is "one hundred fifty-five million, seven hundred seventy-two thousand, two hundred sixty".