77690232 has 64 divisors (see below), whose sum is σ = 221661600. Its totient is φ = 25194240.

The previous prime is 77690231. The next prime is 77690257. The reversal of 77690232 is 23209677.

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 (77690231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3132 + ... + 12852.

Almost surely, 2^77690232 is an apocalyptic number.

77690232 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77690232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110830800).

77690232 is an abundant number, since it is smaller than the sum of its proper divisors (143971368).

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

77690232 is a wasteful number, since it uses less digits than its factorization.

77690232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9773 (or 9763 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 77690232 is about 8814.2062603504. The cubic root of 77690232 is about 426.6995053935.

The spelling of 77690232 in words is "seventy-seven million, six hundred ninety thousand, two hundred thirty-two".