77405330 has 8 divisors (see below), whose sum is σ = 139329612. Its totient is φ = 30962128.

The previous prime is 77405329. The next prime is 77405353. The reversal of 77405330 is 3350477.

It can be written as a sum of positive squares in 2 ways, for example, as 76615009 + 790321 = 8753^2 + 889^2 .

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

It is a super-2 number, since 2×77405330² = 11983170224817800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77405293 and 77405302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3870257 + ... + 3870276.

Almost surely, 2^77405330 is an apocalyptic number.

77405330 is a deficient number, since it is larger than the sum of its proper divisors (61924282).

77405330 is a wasteful number, since it uses less digits than its factorization.

77405330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740540.

The product of its (nonzero) digits is 8820, while the sum is 29.

The square root of 77405330 is about 8798.0298931068. The cubic root of 77405330 is about 426.1772756566.

The spelling of 77405330 in words is "seventy-seven million, four hundred five thousand, three hundred thirty".