55490340 has 48 divisors (see below), whose sum is σ = 160735680. Its totient is φ = 14286720.

The previous prime is 55490321. The next prime is 55490353. The reversal of 55490340 is 4309455.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55490298 and 55490307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14206 + ... + 17685.

It is an arithmetic number, because the mean of its divisors is an integer number (3348660).

Almost surely, 2^55490340 is an apocalyptic number.

It is an amenable number.

55490340 is an abundant number, since it is smaller than the sum of its proper divisors (105245340).

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

55490340 is a wasteful number, since it uses less digits than its factorization.

55490340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31932 (or 31930 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 55490340 is about 7449.1838479125. The cubic root of 55490340 is about 381.4220493732.

Adding to 55490340 its reverse (4309455), we get a palindrome (59799795).

The spelling of 55490340 in words is "fifty-five million, four hundred ninety thousand, three hundred forty".