77923020 has 48 divisors (see below), whose sum is σ = 249355008. Its totient is φ = 17810880.

The previous prime is 77923007. The next prime is 77923033. The reversal of 77923020 is 2032977.

It is an interprime number because it is at equal distance from previous prime (77923007) and next prime (77923033).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 92346 + ... + 93185.

It is an arithmetic number, because the mean of its divisors is an integer number (5194896).

Almost surely, 2^77923020 is an apocalyptic number.

77923020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77923020 is an abundant number, since it is smaller than the sum of its proper divisors (171431988).

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

77923020 is a wasteful number, since it uses less digits than its factorization.

77923020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185550 (or 185548 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 77923020 is about 8827.4016562067. The cubic root of 77923020 is about 427.1252623889.

Adding to 77923020 its reverse (2032977), we get a palindrome (79955997).

The spelling of 77923020 in words is "seventy-seven million, nine hundred twenty-three thousand, twenty".