1631677938 has 16 divisors (see below), whose sum is σ = 3560024736. Its totient is φ = 494447840.

The previous prime is 1631677819. The next prime is 1631677939. The reversal of 1631677938 is 8397761361.

It is not an unprimeable number, because it can be changed into a prime (1631677939) 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, 12361131 + ... + 12361262.

It is an arithmetic number, because the mean of its divisors is an integer number (222501546).

Almost surely, 2^1631677938 is an apocalyptic number.

1631677938 is an abundant number, since it is smaller than the sum of its proper divisors (1928346798).

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

1631677938 is a wasteful number, since it uses less digits than its factorization.

1631677938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24722409.

The product of its digits is 1143072, while the sum is 51.

The square root of 1631677938 is about 40394.0334455474. The cubic root of 1631677938 is about 1177.2756112468.

The spelling of 1631677938 in words is "one billion, six hundred thirty-one million, six hundred seventy-seven thousand, nine hundred thirty-eight".