77402938 has 8 divisors (see below), whose sum is σ = 122934132. Its totient is φ = 36424896.

The previous prime is 77402933. The next prime is 77402959. The reversal of 77402938 is 83920477.

It can be written as a sum of positive squares in 2 ways, for example, as 65658609 + 11744329 = 8103^2 + 3427^2 .

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

It is a super-2 number, since 2×77402938² = 11982429622063688, 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 77402938.

It is not an unprimeable number, because it can be changed into a prime (77402933) by changing a digit.

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, 1138245 + ... + 1138312.

Almost surely, 2^77402938 is an apocalyptic number.

77402938 is a deficient number, since it is larger than the sum of its proper divisors (45531194).

77402938 is a wasteful number, since it uses less digits than its factorization.

77402938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276576.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 77402938 is about 8797.8939525320. The cubic root of 77402938 is about 426.1728856637.

The spelling of 77402938 in words is "seventy-seven million, four hundred two thousand, nine hundred thirty-eight".