45421998 has 24 divisors (see below), whose sum is σ = 92084328. Its totient is φ = 14936688.

The previous prime is 45421991. The next prime is 45422009. The reversal of 45421998 is 89912454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45421991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36840 + ... + 38052.

It is an arithmetic number, because the mean of its divisors is an integer number (3836847).

Almost surely, 2^45421998 is an apocalyptic number.

45421998 is an abundant number, since it is smaller than the sum of its proper divisors (46662330).

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

45421998 is a wasteful number, since it uses less digits than its factorization.

45421998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1297 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 45421998 is about 6739.5844085522. The cubic root of 45421998 is about 356.7977261195.

The spelling of 45421998 in words is "forty-five million, four hundred twenty-one thousand, nine hundred ninety-eight".