77223402 has 16 divisors (see below), whose sum is σ = 171607680. Its totient is φ = 25741116.

The previous prime is 77223383. The next prime is 77223407. The reversal of 77223402 is 20432277.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (77223407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714978 + ... + 715085.

It is an arithmetic number, because the mean of its divisors is an integer number (10725480).

Almost surely, 2^77223402 is an apocalyptic number.

77223402 is an abundant number, since it is smaller than the sum of its proper divisors (94384278).

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

77223402 is a wasteful number, since it uses less digits than its factorization.

77223402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430074 (or 1430068 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 77223402 is about 8787.6846780025. The cubic root of 77223402 is about 425.8431281158.

Adding to 77223402 its reverse (20432277), we get a palindrome (97655679).

The spelling of 77223402 in words is "seventy-seven million, two hundred twenty-three thousand, four hundred two".