190998040 has 16 divisors (see below), whose sum is σ = 429745680. Its totient is φ = 76399200.

The previous prime is 190998029. The next prime is 190998053. The reversal of 190998040 is 40899091.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 4774951 = 190998040 / (1 + 9 + 0 + 9 + 9 + 8 + 0 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 190997984 and 190998002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2387436 + ... + 2387515.

It is an arithmetic number, because the mean of its divisors is an integer number (26859105).

Almost surely, 2^190998040 is an apocalyptic number.

190998040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190998040 is an abundant number, since it is smaller than the sum of its proper divisors (238747640).

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

190998040 is a wasteful number, since it uses less digits than its factorization.

190998040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774962 (or 4774958 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 190998040 is about 13820.2040505920. The cubic root of 190998040 is about 575.8945521347.

The spelling of 190998040 in words is "one hundred ninety million, nine hundred ninety-eight thousand, forty".