76781432 has 144 divisors (see below), whose sum is σ = 194016600. Its totient is φ = 28304640.

The previous prime is 76781407. The next prime is 76781437. The reversal of 76781432 is 23418767.

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

It is an alternating number because its digits alternate between odd and even.

Its product of digits (56448) is a multiple of the sum of its prime factors (126).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76781437) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1258682 + ... + 1258742.

Almost surely, 2^76781432 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 76781432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97008300).

76781432 is an abundant number, since it is smaller than the sum of its proper divisors (117235168).

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

76781432 is a wasteful number, since it uses less digits than its factorization.

76781432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 102 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 76781432 is about 8762.5014693294. The cubic root of 76781432 is about 425.0291689323.

The spelling of 76781432 in words is "seventy-six million, seven hundred eighty-one thousand, four hundred thirty-two".