53658990 has 256 divisors, whose sum is σ = 186624000. Its totient is φ = 10644480.

The previous prime is 53658973. The next prime is 53659003. The reversal of 53658990 is 9985635.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 602866 + ... + 602954.

It is an arithmetic number, because the mean of its divisors is an integer number (729000).

Almost surely, 2^53658990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53658990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93312000).

53658990 is an abundant number, since it is smaller than the sum of its proper divisors (132965010).

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

53658990 is a wasteful number, since it uses less digits than its factorization.

53658990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 53658990 is about 7325.2296892316. The cubic root of 53658990 is about 377.1789941023.

The spelling of 53658990 in words is "fifty-three million, six hundred fifty-eight thousand, nine hundred ninety".