1629161940 has 96 divisors (see below), whose sum is σ = 5324304384. Its totient is φ = 364452480.

The previous prime is 1629161923. The next prime is 1629161959. The reversal of 1629161940 is 491619261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21526 + ... + 61005.

It is an arithmetic number, because the mean of its divisors is an integer number (55461504).

Almost surely, 2^1629161940 is an apocalyptic number.

1629161940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1629161940 is an abundant number, since it is smaller than the sum of its proper divisors (3695142444).

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

1629161940 is a wasteful number, since it uses less digits than its factorization.

1629161940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82597 (or 82595 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1629161940 is about 40362.8782422661. The cubic root of 1629161940 is about 1176.6701921728.

The spelling of 1629161940 in words is "one billion, six hundred twenty-nine million, one hundred sixty-one thousand, nine hundred forty".