678023619 has 16 divisors (see below), whose sum is σ = 1112654592. Its totient is φ = 357638688.

The previous prime is 678023573. The next prime is 678023623. The reversal of 678023619 is 916320876.

It is a happy number.

It is not a de Polignac number, because 678023619 - 2⁹ = 678023107 is a prime.

It is a super-2 number, since 2×678023619² = 919432055843714322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678023639) 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, 1241529 + ... + 1242074.

It is an arithmetic number, because the mean of its divisors is an integer number (69540912).

Almost surely, 2^678023619 is an apocalyptic number.

678023619 is a deficient number, since it is larger than the sum of its proper divisors (434630973).

678023619 is a wasteful number, since it uses less digits than its factorization.

678023619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483626.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 678023619 is about 26038.8866697484. The cubic root of 678023619 is about 878.5131655045.

The spelling of 678023619 in words is "six hundred seventy-eight million, twenty-three thousand, six hundred nineteen".