77950402 has 4 divisors (see below), whose sum is σ = 116925606. Its totient is φ = 38975200.

The previous prime is 77950361. The next prime is 77950409. The reversal of 77950402 is 20405977.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48149721 + 29800681 = 6939^2 + 5459^2 .

It is not an unprimeable number, because it can be changed into a prime (77950409) 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 as a sum of consecutive naturals, namely, 19487599 + ... + 19487602.

Almost surely, 2^77950402 is an apocalyptic number.

77950402 is a deficient number, since it is larger than the sum of its proper divisors (38975204).

77950402 is a wasteful number, since it uses less digits than its factorization.

77950402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38975203.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 77950402 is about 8828.9524859974. The cubic root of 77950402 is about 427.1752868629.

The spelling of 77950402 in words is "seventy-seven million, nine hundred fifty thousand, four hundred two".