60999840 has 144 divisors (see below), whose sum is σ = 227144736. Its totient is φ = 14784000.

The previous prime is 60999839. The next prime is 60999857. The reversal of 60999840 is 4899906.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13915 + ... + 17765.

It is an arithmetic number, because the mean of its divisors is an integer number (1577394).

Almost surely, 2^60999840 is an apocalyptic number.

60999840 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 60999840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113572368).

60999840 is an abundant number, since it is smaller than the sum of its proper divisors (166144896).

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

60999840 is a wasteful number, since it uses less digits than its factorization.

60999840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 60999840 is about 7810.2394329495. The cubic root of 60999840 is about 393.6493741353.

The spelling of 60999840 in words is "sixty million, nine hundred ninety-nine thousand, eight hundred forty".