6453988 has 6 divisors (see below), whose sum is σ = 11294486. Its totient is φ = 3226992.

The previous prime is 6453973. The next prime is 6453989. The reversal of 6453988 is 8893546.

It can be written as a sum of positive squares in only one way, i.e., 6441444 + 12544 = 2538^2 + 112^2 .

It is a super-2 number, since 2×6453988² = 83307922208288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6453989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806745 + ... + 806752.

Almost surely, 2^6453988 is an apocalyptic number.

It is an amenable number.

6453988 is a deficient number, since it is larger than the sum of its proper divisors (4840498).

6453988 is a wasteful number, since it uses less digits than its factorization.

6453988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613501 (or 1613499 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 6453988 is about 2540.4700352494. The cubic root of 6453988 is about 186.1841549147.

The spelling of 6453988 in words is "six million, four hundred fifty-three thousand, nine hundred eighty-eight".