610778988 has 48 divisors (see below), whose sum is σ = 1634590720. Its totient is φ = 197024400.

The previous prime is 610778983. The next prime is 610779011. The reversal of 610778988 is 889877016.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (610778981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87868 + ... + 94563.

Almost surely, 2^610778988 is an apocalyptic number.

It is an amenable number.

610778988 is an abundant number, since it is smaller than the sum of its proper divisors (1023811732).

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

610778988 is a wasteful number, since it uses less digits than its factorization.

610778988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182475 (or 182467 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The square root of 610778988 is about 24713.9431900294. The cubic root of 610778988 is about 848.4534683787.

The spelling of 610778988 in words is "six hundred ten million, seven hundred seventy-eight thousand, nine hundred eighty-eight".