1969634140 has 24 divisors (see below), whose sum is σ = 4151619360. Its totient is φ = 784922688.

The previous prime is 1969634131. The next prime is 1969634143. The reversal of 1969634140 is 414369691.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969634143) 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, 177672 + ... + 188431.

It is an arithmetic number, because the mean of its divisors is an integer number (172984140).

Almost surely, 2^1969634140 is an apocalyptic number.

1969634140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1969634140 is an abundant number, since it is smaller than the sum of its proper divisors (2181985220).

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

1969634140 is a wasteful number, since it uses less digits than its factorization.

1969634140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366381 (or 366379 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1969634140 is about 44380.5603840240. The cubic root of 1969634140 is about 1253.5120729002.

The spelling of 1969634140 in words is "one billion, nine hundred sixty-nine million, six hundred thirty-four thousand, one hundred forty".