3921622740 has 72 divisors (see below), whose sum is σ = 13594963200. Its totient is φ = 896370624.

The previous prime is 3921622739. The next prime is 3921622741. The reversal of 3921622740 is 472261293.

3921622740 is a `hidden beast` number, since 3 + 9 + 21 + 622 + 7 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (3921622739) and next prime (3921622741).

It is a super-3 number, since 3×3921622740³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3921622695 and 3921622704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921622741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1554940 + ... + 1557459.

Almost surely, 2^3921622740 is an apocalyptic number.

3921622740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3921622740 is an abundant number, since it is smaller than the sum of its proper divisors (9673340460).

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

3921622740 is a wasteful number, since it uses less digits than its factorization.

3921622740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112421 (or 3112416 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 3921622740 is about 62622.8611610808. The cubic root of 3921622740 is about 1576.9645749253.

The spelling of 3921622740 in words is "three billion, nine hundred twenty-one million, six hundred twenty-two thousand, seven hundred forty".