1969622040 has 128 divisors (see below), whose sum is σ = 6374842560. Its totient is φ = 484982784.

The previous prime is 1969622033. The next prime is 1969622041. The reversal of 1969622040 is 402269691.

It is a self number, because there is not a number n which added to its sum of digits gives 1969622040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969622041) by changing a digit.

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, 99012 + ... + 117228.

Almost surely, 2^1969622040 is an apocalyptic number.

1969622040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1969622040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3187421280).

1969622040 is an abundant number, since it is smaller than the sum of its proper divisors (4405220520).

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

1969622040 is a wasteful number, since it uses less digits than its factorization.

1969622040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18301 (or 18297 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 1969622040 is about 44380.4240628681. The cubic root of 1969622040 is about 1253.5095060060.

The spelling of 1969622040 in words is "one billion, nine hundred sixty-nine million, six hundred twenty-two thousand, forty".