85438257402 has 8 divisors (see below), whose sum is σ = 170876514816. Its totient is φ = 28479419132.

The previous prime is 85438257397. The next prime is 85438257407. The reversal of 85438257402 is 20475283458.

It is an interprime number because it is at equal distance from previous prime (85438257397) and next prime (85438257407).

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

85438257402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (85438257407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7119854778 + ... + 7119854789.

It is an arithmetic number, because the mean of its divisors is an integer number (21359564352).

Almost surely, 2^85438257402 is an apocalyptic number.

85438257402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85438257402 is a wasteful number, since it uses less digits than its factorization.

85438257402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14239709572.

The product of its (nonzero) digits is 2150400, while the sum is 48.

The spelling of 85438257402 in words is "eighty-five billion, four hundred thirty-eight million, two hundred fifty-seven thousand, four hundred two".