3978357290 has 16 divisors (see below), whose sum is σ = 7354585512. Its totient is φ = 1548333504.

The previous prime is 3978357283. The next prime is 3978357329. The reversal of 3978357290 is 927538793.

It can be written as a sum of positive squares in 4 ways, for example, as 3688983169 + 289374121 = 60737^2 + 17011^2 .

It is a super-2 number, since 2×3978357290² = 31654653453792288200, which contains 22 as substring.

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, 5375789 + ... + 5376528.

Almost surely, 2^3978357290 is an apocalyptic number.

3978357290 is a deficient number, since it is larger than the sum of its proper divisors (3376228222).

3978357290 is a wasteful number, since it uses less digits than its factorization.

3978357290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752361.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The square root of 3978357290 is about 63074.2204866616. The cubic root of 3978357290 is about 1584.5329011334.

The spelling of 3978357290 in words is "three billion, nine hundred seventy-eight million, three hundred fifty-seven thousand, two hundred ninety".