77974730 has 16 divisors (see below), whose sum is σ = 140581224. Its totient is φ = 31139520.

The previous prime is 77974693. The next prime is 77974747. The reversal of 77974730 is 3747977.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 43388569 + 34586161 = 6587^2 + 5881^2 .

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 7 ways as a sum of consecutive naturals, for example, 560 + ... + 12500.

Almost surely, 2^77974730 is an apocalyptic number.

77974730 is a deficient number, since it is larger than the sum of its proper divisors (62606494).

77974730 is a wasteful number, since it uses less digits than its factorization.

77974730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12601.

The product of its (nonzero) digits is 259308, while the sum is 44.

The square root of 77974730 is about 8830.3301184044. The cubic root of 77974730 is about 427.2197221241.

The spelling of 77974730 in words is "seventy-seven million, nine hundred seventy-four thousand, seven hundred thirty".