653633394 has 16 divisors (see below), whose sum is σ = 1308414432. Its totient is φ = 217686528.

The previous prime is 653633377. The next prime is 653633399. The reversal of 653633394 is 493336356.

It is a happy number.

It is a super-2 number, since 2×653633394² = 854473227503918472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (653633399) 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, 40324 + ... + 54159.

It is an arithmetic number, because the mean of its divisors is an integer number (81775902).

Almost surely, 2^653633394 is an apocalyptic number.

653633394 is an abundant number, since it is smaller than the sum of its proper divisors (654781038).

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

653633394 is a wasteful number, since it uses less digits than its factorization.

653633394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95641.

The product of its digits is 524880, while the sum is 42.

The square root of 653633394 is about 25566.2549858207. The cubic root of 653633394 is about 867.8501523411.

The spelling of 653633394 in words is "six hundred fifty-three million, six hundred thirty-three thousand, three hundred ninety-four".