609138988 has 12 divisors (see below), whose sum is σ = 1088674272. Its totient is φ = 298089200.

The previous prime is 609138953. The next prime is 609138991. The reversal of 609138988 is 889831906.

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, 1619863 + ... + 1620238.

It is an arithmetic number, because the mean of its divisors is an integer number (90722856).

Almost surely, 2^609138988 is an apocalyptic number.

It is an amenable number.

609138988 is a deficient number, since it is larger than the sum of its proper divisors (479535284).

609138988 is a wasteful number, since it uses less digits than its factorization.

609138988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240152 (or 3240150 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 609138988 is about 24680.7412368429. The cubic root of 609138988 is about 847.6933947781.

The spelling of 609138988 in words is "six hundred nine million, one hundred thirty-eight thousand, nine hundred eighty-eight".