678248451 has 8 divisors (see below), whose sum is σ = 1004812560. Its totient is φ = 452165616.

The previous prime is 678248429. The next prime is 678248471. The reversal of 678248451 is 154842876.

It is not a de Polignac number, because 678248451 - 2⁵ = 678248419 is a prime.

It is a super-2 number, since 2×678248451² = 920041922567798802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 678248397 and 678248406.

It is not an unprimeable number, because it can be changed into a prime (678248401) 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, 12560130 + ... + 12560183.

It is an arithmetic number, because the mean of its divisors is an integer number (125601570).

Almost surely, 2^678248451 is an apocalyptic number.

678248451 is a deficient number, since it is larger than the sum of its proper divisors (326564109).

678248451 is a wasteful number, since it uses less digits than its factorization.

678248451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25120322 (or 25120316 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 678248451 is about 26043.2035471829. The cubic root of 678248451 is about 878.6102594888.

The spelling of 678248451 in words is "six hundred seventy-eight million, two hundred forty-eight thousand, four hundred fifty-one".