919790140 has 24 divisors (see below), whose sum is σ = 1932971040. Its totient is φ = 367647168.

The previous prime is 919790077. The next prime is 919790149. The reversal of 919790140 is 41097919.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 919790093 and 919790102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919790149) 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, 12489 + ... + 44671.

It is an arithmetic number, because the mean of its divisors is an integer number (80540460).

Almost surely, 2^919790140 is an apocalyptic number.

It is an amenable number.

919790140 is an abundant number, since it is smaller than the sum of its proper divisors (1013180900).

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

919790140 is a wasteful number, since it uses less digits than its factorization.

919790140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33621 (or 33619 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 919790140 is about 30328.0421392480. The cubic root of 919790140 is about 972.5148686056.

The spelling of 919790140 in words is "nine hundred nineteen million, seven hundred ninety thousand, one hundred forty".