77490072 has 48 divisors (see below), whose sum is σ = 228950280. Its totient is φ = 23481600.

The previous prime is 77490071. The next prime is 77490103. The reversal of 77490072 is 27009477.

It is a super-2 number, since 2×77490072² = 12009422517130368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77490071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48129 + ... + 49712.

Almost surely, 2^77490072 is an apocalyptic number.

77490072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

77490072 is an abundant number, since it is smaller than the sum of its proper divisors (151460208).

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

77490072 is a wasteful number, since it uses less digits than its factorization.

77490072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97864 (or 97857 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 77490072 is about 8802.8445402608. The cubic root of 77490072 is about 426.3327427427.

The spelling of 77490072 in words is "seventy-seven million, four hundred ninety thousand, seventy-two".