77470272 has 84 divisors (see below), whose sum is σ = 242261136. Its totient is φ = 23473920.

The previous prime is 77470243. The next prime is 77470307. The reversal of 77470272 is 27207477.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223 + ... + 12449.

Almost surely, 2^77470272 is an apocalyptic number.

77470272 is a gapful number since it is divisible by the number (72) 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 77470272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121130568).

77470272 is an abundant number, since it is smaller than the sum of its proper divisors (164790864).

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

77470272 is a wasteful number, since it uses less digits than its factorization.

77470272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12256 (or 12243 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 77470272 is about 8801.7198319419. The cubic root of 77470272 is about 426.2964279513.

The spelling of 77470272 in words is "seventy-seven million, four hundred seventy thousand, two hundred seventy-two".