55378992 has 20 divisors (see below), whose sum is σ = 143062520. Its totient is φ = 18459648.

The previous prime is 55378957. The next prime is 55379021. The reversal of 55378992 is 29987355.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1153729 = 55378992 / (5 + 5 + 3 + 7 + 8 + 9 + 9 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576817 + ... + 576912.

It is an arithmetic number, because the mean of its divisors is an integer number (7153126).

Almost surely, 2^55378992 is an apocalyptic number.

It is an amenable number.

55378992 is an abundant number, since it is smaller than the sum of its proper divisors (87683528).

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

55378992 is a wasteful number, since it uses less digits than its factorization.

55378992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153740 (or 1153734 counting only the distinct ones).

The product of its digits is 680400, while the sum is 48.

The square root of 55378992 is about 7441.7062559604. The cubic root of 55378992 is about 381.1667555599.

The spelling of 55378992 in words is "fifty-five million, three hundred seventy-eight thousand, nine hundred ninety-two".