901859640 has 128 divisors (see below), whose sum is σ = 3020371200. Its totient is φ = 213534720.

The previous prime is 901859627. The next prime is 901859677. The reversal of 901859640 is 46958109.

It is a junction number, because it is equal to n+sod(n) for n = 901859592 and 901859601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48816 + ... + 64704.

It is an arithmetic number, because the mean of its divisors is an integer number (23596650).

Almost surely, 2^901859640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 901859640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510185600).

901859640 is an abundant number, since it is smaller than the sum of its proper divisors (2118511560).

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

901859640 is a wasteful number, since it uses less digits than its factorization.

901859640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15957 (or 15953 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 901859640 is about 30030.9780060524. The cubic root of 901859640 is about 966.1539132952.

The spelling of 901859640 in words is "nine hundred one million, eight hundred fifty-nine thousand, six hundred forty".