1642198590 has 32 divisors (see below), whose sum is σ = 4379196960. Its totient is φ = 437919552.

The previous prime is 1642198561. The next prime is 1642198627. The reversal of 1642198590 is 958912461.

1642198590 is a `hidden beast` number, since 1 + 6 + 42 + 19 + 8 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 3040839 + ... + 3041378.

It is an arithmetic number, because the mean of its divisors is an integer number (136849905).

Almost surely, 2^1642198590 is an apocalyptic number.

1642198590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1642198590 is an abundant number, since it is smaller than the sum of its proper divisors (2736998370).

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

1642198590 is a wasteful number, since it uses less digits than its factorization.

1642198590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082233 (or 6082227 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 1642198590 is about 40524.0495261764. The cubic root of 1642198590 is about 1179.8004522282.

The spelling of 1642198590 in words is "one billion, six hundred forty-two million, one hundred ninety-eight thousand, five hundred ninety".