53687790 has 48 divisors (see below), whose sum is σ = 150329088. Its totient is φ = 13215168.

The previous prime is 53687783. The next prime is 53687797. The reversal of 53687790 is 9778635.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53687783) and next prime (53687797).

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53687797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21774 + ... + 24113.

It is an arithmetic number, because the mean of its divisors is an integer number (3131856).

Almost surely, 2^53687790 is an apocalyptic number.

53687790 is an abundant number, since it is smaller than the sum of its proper divisors (96641298).

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

53687790 is a wasteful number, since it uses less digits than its factorization.

53687790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45913 (or 45910 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 53687790 is about 7327.1952341943. The cubic root of 53687790 is about 377.2464622139.

The spelling of 53687790 in words is "fifty-three million, six hundred eighty-seven thousand, seven hundred ninety".