74763640 has 64 divisors (see below), whose sum is σ = 193752000. Its totient is φ = 25433088.

The previous prime is 74763631. The next prime is 74763677. The reversal of 74763640 is 4636747.

It is a self number, because there is not a number n which added to its sum of digits gives 74763640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37386 + ... + 39334.

It is an arithmetic number, because the mean of its divisors is an integer number (3027375).

Almost surely, 2^74763640 is an apocalyptic number.

74763640 is a gapful number since it is divisible by the number (70) 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 74763640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96876000).

74763640 is an abundant number, since it is smaller than the sum of its proper divisors (118988360).

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

74763640 is a wasteful number, since it uses less digits than its factorization.

74763640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104 (or 2100 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 74763640 is about 8646.5970184807. The cubic root of 74763640 is about 421.2728581373.

The spelling of 74763640 in words is "seventy-four million, seven hundred sixty-three thousand, six hundred forty".