78541898 has 8 divisors (see below), whose sum is σ = 120997092. Its totient is φ = 38209536.

The previous prime is 78541871. The next prime is 78541901. The reversal of 78541898 is 89814587.

It can be written as a sum of positive squares in 2 ways, for example, as 66961489 + 11580409 = 8183^2 + 3403^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530615 + ... + 530762.

Almost surely, 2^78541898 is an apocalyptic number.

78541898 is a deficient number, since it is larger than the sum of its proper divisors (42455194).

78541898 is a wasteful number, since it uses less digits than its factorization.

78541898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061416.

The product of its digits is 645120, while the sum is 50.

The square root of 78541898 is about 8862.3866988526. The cubic root of 78541898 is about 428.2530493278.

The spelling of 78541898 in words is "seventy-eight million, five hundred forty-one thousand, eight hundred ninety-eight".