190121040 has 80 divisors (see below), whose sum is σ = 654868800. Its totient is φ = 50698368.

The previous prime is 190121033. The next prime is 190121051. The reversal of 190121040 is 40121091.

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

It is a super-2 number, since 2×190121040² = 72292019701363200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 41850 + ... + 46169.

It is an arithmetic number, because the mean of its divisors is an integer number (8185860).

Almost surely, 2^190121040 is an apocalyptic number.

190121040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190121040 is an abundant number, since it is smaller than the sum of its proper divisors (464747760).

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

190121040 is a wasteful number, since it uses less digits than its factorization.

190121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88041 (or 88029 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 190121040 is about 13788.4386353205. The cubic root of 190121040 is about 575.0117603140.

The spelling of 190121040 in words is "one hundred ninety million, one hundred twenty-one thousand, forty".