45981138 has 32 divisors (see below), whose sum is σ = 106289280. Its totient is φ = 12988800.

The previous prime is 45981137. The next prime is 45981223. The reversal of 45981138 is 83118954.

It is a super-2 number, since 2×45981138² = 4228530103550088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45981096 and 45981105.

It is not an unprimeable number, because it can be changed into a prime (45981137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2413 + ... + 9888.

It is an arithmetic number, because the mean of its divisors is an integer number (3321540).

Almost surely, 2^45981138 is an apocalyptic number.

45981138 is an abundant number, since it is smaller than the sum of its proper divisors (60308142).

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

45981138 is a wasteful number, since it uses less digits than its factorization.

45981138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12402.

The product of its digits is 34560, while the sum is 39.

The square root of 45981138 is about 6780.9393154636. The cubic root of 45981138 is about 358.2558068926.

The spelling of 45981138 in words is "forty-five million, nine hundred eighty-one thousand, one hundred thirty-eight".