42640998 has 32 divisors (see below), whose sum is σ = 91165824. Its totient is φ = 13249152.

The previous prime is 42640957. The next prime is 42641009. The reversal of 42640998 is 89904624.

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, 8961 + ... + 12867.

It is an arithmetic number, because the mean of its divisors is an integer number (2848932).

Almost surely, 2^42640998 is an apocalyptic number.

42640998 is an abundant number, since it is smaller than the sum of its proper divisors (48524826).

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

42640998 is a wasteful number, since it uses less digits than its factorization.

42640998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 42640998 is about 6530.0075038242. The cubic root of 42640998 is about 349.3620979445.

The spelling of 42640998 in words is "forty-two million, six hundred forty thousand, nine hundred ninety-eight".