77212694 has 32 divisors (see below), whose sum is σ = 132300000. Its totient is φ = 33502464.

The previous prime is 77212669. The next prime is 77212699. The reversal of 77212694 is 49621277.

It is a super-2 number, since 2×77212694² = 11923600229475272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77212699) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 73082 + ... + 74130.

It is an arithmetic number, because the mean of its divisors is an integer number (4134375).

Almost surely, 2^77212694 is an apocalyptic number.

77212694 is a deficient number, since it is larger than the sum of its proper divisors (55087306).

77212694 is a wasteful number, since it uses less digits than its factorization.

77212694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its digits is 42336, while the sum is 38.

The square root of 77212694 is about 8787.0753951471. The cubic root of 77212694 is about 425.8234443633.

The spelling of 77212694 in words is "seventy-seven million, two hundred twelve thousand, six hundred ninety-four".