3951613428 has 216 divisors, whose sum is σ = 11376709344. Its totient is φ = 1064044800.

The previous prime is 3951613411. The next prime is 3951613447. The reversal of 3951613428 is 8243161593.

It is a super-2 number, since 2×3951613428² = 31230497368699822368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 3951613428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 30164923 + ... + 30165053.

Almost surely, 2^3951613428 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 3951613428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5688354672).

3951613428 is an abundant number, since it is smaller than the sum of its proper divisors (7425095916).

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

3951613428 is a wasteful number, since it uses less digits than its factorization.

3951613428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 233 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 3951613428 is about 62861.8598833983. The cubic root of 3951613428 is about 1580.9743266749.

The spelling of 3951613428 in words is "three billion, nine hundred fifty-one million, six hundred thirteen thousand, four hundred twenty-eight".