655020490 has 8 divisors (see below), whose sum is σ = 1179036900. Its totient is φ = 262008192.

The previous prime is 655020467. The next prime is 655020491. The reversal of 655020490 is 94020556.

It can be written as a sum of positive squares in 2 ways, for example, as 640950489 + 14070001 = 25317^2 + 3751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (655020491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32751015 + ... + 32751034.

Almost surely, 2^655020490 is an apocalyptic number.

655020490 is a deficient number, since it is larger than the sum of its proper divisors (524016410).

655020490 is a wasteful number, since it uses less digits than its factorization.

655020490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65502056.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 655020490 is about 25593.3680862836. The cubic root of 655020490 is about 868.4636159706.

The spelling of 655020490 in words is "six hundred fifty-five million, twenty thousand, four hundred ninety".