961287520 has 48 divisors (see below), whose sum is σ = 2390577840. Its totient is φ = 364276224.

The previous prime is 961287499. The next prime is 961287527. The reversal of 961287520 is 25782169.

It is a super-2 number, since 2×961287520² = 1848147392215500800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961287527) 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, 155067 + ... + 161146.

It is an arithmetic number, because the mean of its divisors is an integer number (49803705).

Almost surely, 2^961287520 is an apocalyptic number.

It is an amenable number.

961287520 is an abundant number, since it is smaller than the sum of its proper divisors (1429290320).

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

961287520 is a wasteful number, since it uses less digits than its factorization.

961287520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316247 (or 316239 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 961287520 is about 31004.6370725413. The cubic root of 961287520 is about 986.9256462450.

The spelling of 961287520 in words is "nine hundred sixty-one million, two hundred eighty-seven thousand, five hundred twenty".