3978635437 has 8 divisors (see below), whose sum is σ = 4551721856. Its totient is φ = 3406726512.

The previous prime is 3978635431. The next prime is 3978635467. The reversal of 3978635437 is 7345368793.

3978635437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3978635437 - 2¹¹ = 3978633389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978635431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287118 + ... + 300655.

It is an arithmetic number, because the mean of its divisors is an integer number (568965232).

Almost surely, 2^3978635437 is an apocalyptic number.

It is an amenable number.

3978635437 is a deficient number, since it is larger than the sum of its proper divisors (573086419).

3978635437 is an equidigital number, since it uses as much as digits as its factorization.

3978635437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588747.

The product of its digits is 11430720, while the sum is 55.

The square root of 3978635437 is about 63076.4253663760. The cubic root of 3978635437 is about 1584.5698278320.

The spelling of 3978635437 in words is "three billion, nine hundred seventy-eight million, six hundred thirty-five thousand, four hundred thirty-seven".