2942661690 has 64 divisors (see below), whose sum is σ = 7860758400. Its totient is φ = 783343872.

The previous prime is 2942661649. The next prime is 2942661719. The reversal of 2942661690 is 961662492.

2942661690 is a `hidden beast` number, since 2 + 9 + 4 + 26 + 616 + 9 + 0 = 666.

It is a super-2 number, since 2×2942661690² = 17318515643587312200, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 150921 + ... + 169299.

It is an arithmetic number, because the mean of its divisors is an integer number (122824350).

Almost surely, 2^2942661690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2942661690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3930379200).

2942661690 is an abundant number, since it is smaller than the sum of its proper divisors (4918096710).

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

2942661690 is a wasteful number, since it uses less digits than its factorization.

2942661690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18988 (or 18982 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 2942661690 is about 54246.3057728358. The cubic root of 2942661690 is about 1433.0019402724.

The spelling of 2942661690 in words is "two billion, nine hundred forty-two million, six hundred sixty-one thousand, six hundred ninety".