655454380 has 72 divisors (see below), whose sum is σ = 1695411648. Its totient is φ = 211502592.

The previous prime is 655454377. The next prime is 655454407. The reversal of 655454380 is 83454556.

It is a super-2 number, since 2×655454380² = 859240888522368800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3012 + ... + 36331.

It is an arithmetic number, because the mean of its divisors is an integer number (23547384).

Almost surely, 2^655454380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655454380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (847705824).

655454380 is an abundant number, since it is smaller than the sum of its proper divisors (1039957268).

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

655454380 is a wasteful number, since it uses less digits than its factorization.

655454380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39383 (or 39374 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The square root of 655454380 is about 25601.8432930131. The cubic root of 655454380 is about 868.6553323686.

The spelling of 655454380 in words is "six hundred fifty-five million, four hundred fifty-four thousand, three hundred eighty".