76401778 has 8 divisors (see below), whose sum is σ = 117397980. Its totient is φ = 37269120.

The previous prime is 76401733. The next prime is 76401799. The reversal of 76401778 is 87710467.

It can be written as a sum of positive squares in 2 ways, for example, as 66308449 + 10093329 = 8143^2 + 3177^2 .

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

It is a super-2 number, since 2×76401778² = 11674463363122568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76401778.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 465783 + ... + 465946.

Almost surely, 2^76401778 is an apocalyptic number.

76401778 is a deficient number, since it is larger than the sum of its proper divisors (40996202).

76401778 is a wasteful number, since it uses less digits than its factorization.

76401778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931772.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 76401778 is about 8740.8110607655. The cubic root of 76401778 is about 424.3274770715.

The spelling of 76401778 in words is "seventy-six million, four hundred one thousand, seven hundred seventy-eight".