3478921690840 has 32 divisors (see below), whose sum is σ = 7899386418000. Its totient is φ = 1378801989504.

The previous prime is 3478921690823. The next prime is 3478921690889. The reversal of 3478921690840 is 480961298743.

It is a super-2 number, since 2×3478921690840² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398954550 + ... + 398963269.

Almost surely, 2^{3478921690840} is an apocalyptic number.

It is an amenable number.

3478921690840 is an abundant number, since it is smaller than the sum of its proper divisors (4420464727160).

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

3478921690840 is a wasteful number, since it uses less digits than its factorization.

3478921690840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797917939 (or 797917935 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 3478921690840 in words is "three trillion, four hundred seventy-eight billion, nine hundred twenty-one million, six hundred ninety thousand, eight hundred forty".