3890017640 has 64 divisors (see below), whose sum is σ = 9061493760. Its totient is φ = 1501378560.

The previous prime is 3890017619. The next prime is 3890017667. The reversal of 3890017640 is 467100983.

It is a super-2 number, since 2×3890017640² = 30264474479022339200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3890017594 and 3890017603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433277 + ... + 442163.

It is an arithmetic number, because the mean of its divisors is an integer number (141585840).

Almost surely, 2^3890017640 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 3890017640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4530746880).

3890017640 is an abundant number, since it is smaller than the sum of its proper divisors (5171476120).

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

3890017640 is a wasteful number, since it uses less digits than its factorization.

3890017640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9282 (or 9278 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 3890017640 is about 62370.0059323390. The cubic root of 3890017640 is about 1572.7167911684.

The spelling of 3890017640 in words is "three billion, eight hundred ninety million, seventeen thousand, six hundred forty".