55540394 has 64 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 19934208.

The previous prime is 55540379. The next prime is 55540399. The reversal of 55540394 is 49304555.

It is not an unprimeable number, because it can be changed into a prime (55540399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89417 + ... + 90035.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^55540394 is an apocalyptic number.

55540394 is an abundant number, since it is smaller than the sum of its proper divisors (56952406).

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

55540394 is a wasteful number, since it uses less digits than its factorization.

55540394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 55540394 is about 7452.5427875323. The cubic root of 55540394 is about 381.5366997291.

The spelling of 55540394 in words is "fifty-five million, five hundred forty thousand, three hundred ninety-four".