30438199278 has 20 divisors (see below), whose sum is σ = 68204113560. Its totient is φ = 10146066372.

The previous prime is 30438199249. The next prime is 30438199313. The reversal of 30438199278 is 87299183403.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 93944898 + ... + 93945221.

It is an arithmetic number, because the mean of its divisors is an integer number (3410205678).

Almost surely, 2^30438199278 is an apocalyptic number.

30438199278 is an abundant number, since it is smaller than the sum of its proper divisors (37765914282).

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

30438199278 is a wasteful number, since it uses less digits than its factorization.

30438199278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187890133 (or 187890124 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 30438199278 in words is "thirty billion, four hundred thirty-eight million, one hundred ninety-nine thousand, two hundred seventy-eight".