55926390 has 32 divisors (see below), whose sum is σ = 144549216. Its totient is φ = 13766400.

The previous prime is 55926361. The next prime is 55926397. The reversal of 55926390 is 9362955.

It is a super-2 number, since 2×55926390² = 6255522196864200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55926397) 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, 71311 + ... + 72090.

It is an arithmetic number, because the mean of its divisors is an integer number (4517163).

Almost surely, 2^55926390 is an apocalyptic number.

55926390 is an abundant number, since it is smaller than the sum of its proper divisors (88622826).

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

55926390 is a wasteful number, since it uses less digits than its factorization.

55926390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143424.

The product of its (nonzero) digits is 72900, while the sum is 39.

The square root of 55926390 is about 7478.3948812563. The cubic root of 55926390 is about 382.4185310707.

The spelling of 55926390 in words is "fifty-five million, nine hundred twenty-six thousand, three hundred ninety".