55392340 has 12 divisors (see below), whose sum is σ = 116323956. Its totient is φ = 22156928.

The previous prime is 55392301. The next prime is 55392347. The reversal of 55392340 is 4329355.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 38713284 = 4084^2 + 6222^2 .

It is a super-3 number, since 3×55392340³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55392347) 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, 1384789 + ... + 1384828.

It is an arithmetic number, because the mean of its divisors is an integer number (9693663).

Almost surely, 2^55392340 is an apocalyptic number.

It is an amenable number.

55392340 is an abundant number, since it is smaller than the sum of its proper divisors (60931616).

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

55392340 is a wasteful number, since it uses less digits than its factorization.

55392340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769626 (or 2769624 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 55392340 is about 7442.6030392599. The cubic root of 55392340 is about 381.1973773110.

The spelling of 55392340 in words is "fifty-five million, three hundred ninety-two thousand, three hundred forty".