77634472 has 8 divisors (see below), whose sum is σ = 145564650. Its totient is φ = 38817232.

The previous prime is 77634463. The next prime is 77634481. The reversal of 77634472 is 27443677.

It is an interprime number because it is at equal distance from previous prime (77634463) and next prime (77634481).

It can be written as a sum of positive squares in only one way, i.e., 65060356 + 12574116 = 8066^2 + 3546^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×77634472² = 12054222485437568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4852147 + ... + 4852162.

Almost surely, 2^77634472 is an apocalyptic number.

It is an amenable number.

77634472 is a deficient number, since it is larger than the sum of its proper divisors (67930178).

77634472 is a wasteful number, since it uses less digits than its factorization.

77634472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9704315 (or 9704311 counting only the distinct ones).

The product of its digits is 197568, while the sum is 40.

The square root of 77634472 is about 8811.0426170800. The cubic root of 77634472 is about 426.5973970663.

The spelling of 77634472 in words is "seventy-seven million, six hundred thirty-four thousand, four hundred seventy-two".