655251438 has 32 divisors (see below), whose sum is σ = 1340328960. Its totient is φ = 213501600.

The previous prime is 655251407. The next prime is 655251469. The reversal of 655251438 is 834152556.

It is an interprime number because it is at equal distance from previous prime (655251407) and next prime (655251469).

It is a junction number, because it is equal to n+sod(n) for n = 655251396 and 655251405.

It is a congruent number.

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, 41031 + ... + 54717.

It is an arithmetic number, because the mean of its divisors is an integer number (41885280).

Almost surely, 2^655251438 is an apocalyptic number.

655251438 is an abundant number, since it is smaller than the sum of its proper divisors (685077522).

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

655251438 is a wasteful number, since it uses less digits than its factorization.

655251438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13872.

The product of its digits is 144000, while the sum is 39.

The square root of 655251438 is about 25597.8795606199. The cubic root of 655251438 is about 868.5656719981.

The spelling of 655251438 in words is "six hundred fifty-five million, two hundred fifty-one thousand, four hundred thirty-eight".