1031664140 has 48 divisors (see below), whose sum is σ = 2390078880. Its totient is φ = 371627520.

The previous prime is 1031664131. The next prime is 1031664143. The reversal of 1031664140 is 414661301.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1031664143) 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, 37730 + ... + 59049.

It is an arithmetic number, because the mean of its divisors is an integer number (49793310).

Almost surely, 2^1031664140 is an apocalyptic number.

1031664140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031664140 is an abundant number, since it is smaller than the sum of its proper divisors (1358414740).

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

1031664140 is a wasteful number, since it uses less digits than its factorization.

1031664140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96842 (or 96840 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1031664140 is about 32119.5289504687. The cubic root of 1031664140 is about 1010.4452306225.

The spelling of 1031664140 in words is "one billion, thirty-one million, six hundred sixty-four thousand, one hundred forty".