77649462 has 64 divisors (see below), whose sum is σ = 191416320. Its totient is φ = 23133600.

The previous prime is 77649461. The next prime is 77649463. The reversal of 77649462 is 26494677.

It is an interprime number because it is at equal distance from previous prime (77649461) and next prime (77649463).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77649461) 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, 35163 + ... + 37305.

It is an arithmetic number, because the mean of its divisors is an integer number (2990880).

Almost surely, 2^77649462 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77649462, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95708160).

77649462 is an abundant number, since it is smaller than the sum of its proper divisors (113766858).

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

77649462 is a wasteful number, since it uses less digits than its factorization.

77649462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226 (or 2220 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 77649462 is about 8811.8932131523. The cubic root of 77649462 is about 426.6248517235.

The spelling of 77649462 in words is "seventy-seven million, six hundred forty-nine thousand, four hundred sixty-two".