55437804 has 24 divisors (see below), whose sum is σ = 143727920. Its totient is φ = 18479232.

The previous prime is 55437779. The next prime is 55437829. The reversal of 55437804 is 40873455.

It is an interprime number because it is at equal distance from previous prime (55437779) and next prime (55437829).

It is a super-2 number, since 2×55437804² = 6146700224684832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256549 + ... + 256764.

Almost surely, 2^55437804 is an apocalyptic number.

55437804 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55437804 is an abundant number, since it is smaller than the sum of its proper divisors (88290116).

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

55437804 is a wasteful number, since it uses less digits than its factorization.

55437804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513326 (or 513318 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 55437804 is about 7445.6567205318. The cubic root of 55437804 is about 381.3016397310.

The spelling of 55437804 in words is "fifty-five million, four hundred thirty-seven thousand, eight hundred four".