6406974388 has 48 divisors (see below), whose sum is σ = 11756876544. Its totient is φ = 3051868160.

The previous prime is 6406974317. The next prime is 6406974389. The reversal of 6406974388 is 8834796046.

It is a super-3 number, since 3×6406974388³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406974389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5263956 + ... + 5265172.

It is an arithmetic number, because the mean of its divisors is an integer number (244934928).

Almost surely, 2^6406974388 is an apocalyptic number.

It is an amenable number.

6406974388 is a deficient number, since it is larger than the sum of its proper divisors (5349902156).

6406974388 is a wasteful number, since it uses less digits than its factorization.

6406974388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 55.

The square root of 6406974388 is about 80043.5780559565. The cubic root of 6406974388 is about 1857.3097103072.

The spelling of 6406974388 in words is "six billion, four hundred six million, nine hundred seventy-four thousand, three hundred eighty-eight".