2391661948 has 24 divisors (see below), whose sum is σ = 4508692272. Its totient is φ = 1103518464.

The previous prime is 2391661927. The next prime is 2391661963. The reversal of 2391661948 is 8491661932.

It is a happy number.

It is a super-2 number, since 2×2391661948² = 11440093747022309408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346911 + ... + 353737.

It is an arithmetic number, because the mean of its divisors is an integer number (187862178).

Almost surely, 2^2391661948 is an apocalyptic number.

It is an amenable number.

2391661948 is a deficient number, since it is larger than the sum of its proper divisors (2117030324).

2391661948 is a wasteful number, since it uses less digits than its factorization.

2391661948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13581 (or 13579 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 2391661948 is about 48904.6209268613. The cubic root of 2391661948 is about 1337.3136103616.

The spelling of 2391661948 in words is "two billion, three hundred ninety-one million, six hundred sixty-one thousand, nine hundred forty-eight".