60521640 has 128 divisors (see below), whose sum is σ = 191410560. Its totient is φ = 15289344.

The previous prime is 60521639. The next prime is 60521653. The reversal of 60521640 is 4612506.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 60521640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190762 + ... + 191078.

It is an arithmetic number, because the mean of its divisors is an integer number (1495395).

Almost surely, 2^60521640 is an apocalyptic number.

60521640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 60521640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95705280).

60521640 is an abundant number, since it is smaller than the sum of its proper divisors (130888920).

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

60521640 is a wasteful number, since it uses less digits than its factorization.

60521640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 60521640 is about 7779.5655405684. The cubic root of 60521640 is about 392.6180206842.

The spelling of 60521640 in words is "sixty million, five hundred twenty-one thousand, six hundred forty".