55406774 has 32 divisors (see below), whose sum is σ = 93312000. Its totient is φ = 24520320.

The previous prime is 55406731. The next prime is 55406777. The reversal of 55406774 is 47760455.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55406777) 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, 128339 + ... + 128769.

It is an arithmetic number, because the mean of its divisors is an integer number (2916000).

Almost surely, 2^55406774 is an apocalyptic number.

55406774 is a deficient number, since it is larger than the sum of its proper divisors (37905226).

55406774 is a wasteful number, since it uses less digits than its factorization.

55406774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 55406774 is about 7443.5726637146. The cubic root of 55406774 is about 381.2304849278.

The spelling of 55406774 in words is "fifty-five million, four hundred six thousand, seven hundred seventy-four".