3945939740 has 48 divisors (see below), whose sum is σ = 8536225152. Its totient is φ = 1531063296.

The previous prime is 3945939617. The next prime is 3945939761. The reversal of 3945939740 is 479395493.

It is a happy number.

It is a super-2 number, since 2×3945939740² = 31140880863422535200, which 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 15 ways as a sum of consecutive naturals, for example, 241469 + ... + 257291.

It is an arithmetic number, because the mean of its divisors is an integer number (177838024).

Almost surely, 2^3945939740 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 3945939740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4268112576).

3945939740 is an abundant number, since it is smaller than the sum of its proper divisors (4590285412).

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

3945939740 is a wasteful number, since it uses less digits than its factorization.

3945939740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16206 (or 16204 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 53.

The square root of 3945939740 is about 62816.7154505869. The cubic root of 3945939740 is about 1580.2173150856.

The spelling of 3945939740 in words is "three billion, nine hundred forty-five million, nine hundred thirty-nine thousand, seven hundred forty".