77542472 has 32 divisors (see below), whose sum is σ = 167728320. Its totient is φ = 32919360.

The previous prime is 77542471. The next prime is 77542481. The reversal of 77542472 is 27424577.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (77542471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479 + ... + 12462.

It is an arithmetic number, because the mean of its divisors is an integer number (5241510).

Almost surely, 2^77542472 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 77542472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83864160).

77542472 is an abundant number, since it is smaller than the sum of its proper divisors (90185848).

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

77542472 is a wasteful number, since it uses less digits than its factorization.

77542472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13061 (or 13057 counting only the distinct ones).

The product of its digits is 109760, while the sum is 38.

The square root of 77542472 is about 8805.8203479290. The cubic root of 77542472 is about 426.4288187152.

The spelling of 77542472 in words is "seventy-seven million, five hundred forty-two thousand, four hundred seventy-two".