77203412 has 48 divisors (see below), whose sum is σ = 161046144. Its totient is φ = 31920000.

The previous prime is 77203397. The next prime is 77203421. The reversal of 77203412 is 21430277.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39662 + ... + 41562.

It is an arithmetic number, because the mean of its divisors is an integer number (3355128).

Almost surely, 2^77203412 is an apocalyptic number.

It is an amenable number.

77203412 is an abundant number, since it is smaller than the sum of its proper divisors (83842732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77203412 is a wasteful number, since it uses less digits than its factorization.

77203412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000 (or 1998 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 77203412 is about 8786.5472171952. The cubic root of 77203412 is about 425.8063804524.

Adding to 77203412 its reverse (21430277), we get a palindrome (98633689).

The spelling of 77203412 in words is "seventy-seven million, two hundred three thousand, four hundred twelve".