189797040 has 80 divisors (see below), whose sum is σ = 653752800. Its totient is φ = 50611968.

The previous prime is 189797029. The next prime is 189797051. The reversal of 189797040 is 40797981.

It is an interprime number because it is at equal distance from previous prime (189797029) and next prime (189797051).

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 (45).

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, 41775 + ... + 46094.

It is an arithmetic number, because the mean of its divisors is an integer number (8171910).

Almost surely, 2^189797040 is an apocalyptic number.

189797040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189797040 is an abundant number, since it is smaller than the sum of its proper divisors (463955760).

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

189797040 is a wasteful number, since it uses less digits than its factorization.

189797040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87891 (or 87879 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 189797040 is about 13776.6846519763. The cubic root of 189797040 is about 574.6849338841.

The spelling of 189797040 in words is "one hundred eighty-nine million, seven hundred ninety-seven thousand, forty".