1930997040 has 80 divisors (see below), whose sum is σ = 6841252608. Its totient is φ = 441370368.

The previous prime is 1930997023. The next prime is 1930997069. The reversal of 1930997040 is 407990391.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1930996983 and 1930997001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573022 + ... + 576381.

Almost surely, 2^1930997040 is an apocalyptic number.

1930997040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1930997040 is an abundant number, since it is smaller than the sum of its proper divisors (4910255568).

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

1930997040 is a wasteful number, since it uses less digits than its factorization.

1930997040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149426 (or 1149420 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 1930997040 is about 43943.1114055434. Note that the first 3 decimals coincide. The cubic root of 1930997040 is about 1245.2614279802.

The spelling of 1930997040 in words is "one billion, nine hundred thirty million, nine hundred ninety-seven thousand, forty".