55490402 has 16 divisors (see below), whose sum is σ = 91742112. Its totient is φ = 24961920.

The previous prime is 55490401. The next prime is 55490411. The reversal of 55490402 is 20409455.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55490401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10868 + ... + 15135.

It is an arithmetic number, because the mean of its divisors is an integer number (5733882).

Almost surely, 2^55490402 is an apocalyptic number.

55490402 is a deficient number, since it is larger than the sum of its proper divisors (36251710).

55490402 is a wasteful number, since it uses less digits than its factorization.

55490402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26113.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55490402 is about 7449.1880094410. The cubic root of 55490402 is about 381.4221914289.

Adding to 55490402 its reverse (20409455), we get a palindrome (75899857).

The spelling of 55490402 in words is "fifty-five million, four hundred ninety thousand, four hundred two".