57890981 has 8 divisors (see below), whose sum is σ = 61031424. Its totient is φ = 54830160.

The previous prime is 57890969. The next prime is 57890983. The reversal of 57890981 is 18909875.

It is a happy number.

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 57890981 - 2¹⁰ = 57889957 is a prime.

It is a super-2 number, since 2×57890981² = 6702731362284722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57890983) 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, 18410 + ... + 21323.

It is an arithmetic number, because the mean of its divisors is an integer number (7628928).

Almost surely, 2^57890981 is an apocalyptic number.

It is an amenable number.

57890981 is a deficient number, since it is larger than the sum of its proper divisors (3140443).

57890981 is a wasteful number, since it uses less digits than its factorization.

57890981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39811.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 57890981 is about 7608.6122913446. The cubic root of 57890981 is about 386.8449837302.

The spelling of 57890981 in words is "fifty-seven million, eight hundred ninety thousand, nine hundred eighty-one".