76399240 has 16 divisors (see below), whose sum is σ = 171898380. Its totient is φ = 30559680.

The previous prime is 76399223. The next prime is 76399249. The reversal of 76399240 is 4299367.

It can be written as a sum of positive squares in 2 ways, for example, as 75585636 + 813604 = 8694^2 + 902^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1909981 = 76399240 / (7 + 6 + 3 + 9 + 9 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 76399193 and 76399202.

It is not an unprimeable number, because it can be changed into a prime (76399249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954951 + ... + 955030.

Almost surely, 2^76399240 is an apocalyptic number.

It is an amenable number.

76399240 is an abundant number, since it is smaller than the sum of its proper divisors (95499140).

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

76399240 is a wasteful number, since it uses less digits than its factorization.

76399240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909992 (or 1909988 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 76399240 is about 8740.6658785244. The cubic root of 76399240 is about 424.3227784241.

The spelling of 76399240 in words is "seventy-six million, three hundred ninety-nine thousand, two hundred forty".