77694012 has 96 divisors (see below), whose sum is σ = 232727040. Its totient is φ = 22152960.

The previous prime is 77694011. The next prime is 77694013. The reversal of 77694012 is 21049677.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77694011) and next prime (77694013).

It is a super-2 number, since 2×77694012² = 12072719001312288, which contains 22 as substring.

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 (77694011) 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, 18273 + ... + 22119.

It is an arithmetic number, because the mean of its divisors is an integer number (2424240).

Almost surely, 2^77694012 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 77694012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116363520).

77694012 is an abundant number, since it is smaller than the sum of its proper divisors (155033028).

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

77694012 is a wasteful number, since it uses less digits than its factorization.

77694012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888 (or 3880 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 77694012 is about 8814.4206843105. The cubic root of 77694012 is about 426.7064256027.

It can be divided in two parts, 7769 and 4012, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 77694012 in words is "seventy-seven million, six hundred ninety-four thousand, twelve".