45891381 has 8 divisors (see below), whose sum is σ = 64787904. Its totient is φ = 28794560.

The previous prime is 45891367. The next prime is 45891389. The reversal of 45891381 is 18319854.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45891381 - 2¹⁵ = 45858613 is a prime.

It is a super-2 number, since 2×45891381² = 4212037700174322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45891389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449865 + ... + 449966.

It is an arithmetic number, because the mean of its divisors is an integer number (8098488).

Almost surely, 2^45891381 is an apocalyptic number.

It is an amenable number.

45891381 is a deficient number, since it is larger than the sum of its proper divisors (18896523).

45891381 is a wasteful number, since it uses less digits than its factorization.

45891381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899851.

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

The square root of 45891381 is about 6774.3177516264. The cubic root of 45891381 is about 358.0225452131.

The spelling of 45891381 in words is "forty-five million, eight hundred ninety-one thousand, three hundred eighty-one".