77420236 has 12 divisors (see below), whose sum is σ = 135639280. Its totient is φ = 38666160.

The previous prime is 77420221. The next prime is 77420249. The reversal of 77420236 is 63202477.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77420198 and 77420207.

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, 6855 + ... + 14206.

Almost surely, 2^77420236 is an apocalyptic number.

It is an amenable number.

77420236 is a deficient number, since it is larger than the sum of its proper divisors (58219044).

77420236 is a wasteful number, since it uses less digits than its factorization.

77420236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21984 (or 21982 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 77420236 is about 8798.8769737961. The cubic root of 77420236 is about 426.2046303221.

The spelling of 77420236 in words is "seventy-seven million, four hundred twenty thousand, two hundred thirty-six".