76400290 has 8 divisors (see below), whose sum is σ = 137520540. Its totient is φ = 30560112.

The previous prime is 76400287. The next prime is 76400299. The reversal of 76400290 is 9200467.

It can be written as a sum of positive squares in 2 ways, for example, as 66243321 + 10156969 = 8139^2 + 3187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (76400299) 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, 3820005 + ... + 3820024.

Almost surely, 2^76400290 is an apocalyptic number.

76400290 is a deficient number, since it is larger than the sum of its proper divisors (61120250).

76400290 is a wasteful number, since it uses less digits than its factorization.

76400290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7640036.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 76400290 is about 8740.7259423917. The cubic root of 76400290 is about 424.3247223216.

The spelling of 76400290 in words is "seventy-six million, four hundred thousand, two hundred ninety".