44345981 has 4 divisors (see below), whose sum is σ = 46680000. Its totient is φ = 42011964.

The previous prime is 44345971. The next prime is 44345999. The reversal of 44345981 is 18954344.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 44345981 - 2¹⁰ = 44344957 is a prime.

It is a super-2 number, since 2×44345981² = 3933132061704722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44345921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166981 + ... + 1167018.

It is an arithmetic number, because the mean of its divisors is an integer number (11670000).

Almost surely, 2^44345981 is an apocalyptic number.

It is an amenable number.

44345981 is a deficient number, since it is larger than the sum of its proper divisors (2334019).

44345981 is a wasteful number, since it uses less digits than its factorization.

44345981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334018.

The product of its digits is 69120, while the sum is 38.

The square root of 44345981 is about 6659.2778136972. The cubic root of 44345981 is about 353.9577470929.

The spelling of 44345981 in words is "forty-four million, three hundred forty-five thousand, nine hundred eighty-one".