394212691621452 has 96 divisors (see below), whose sum is σ = 1005646607207424. Its totient is φ = 119196972763200.

The previous prime is 394212691621447. The next prime is 394212691621457. The reversal of 394212691621452 is 254126196212493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (394212691621447) and next prime (394212691621457).

It is a junction number, because it is equal to n+sod(n) for n = 394212691621392 and 394212691621401.

It is not an unprimeable number, because it can be changed into a prime (394212691621457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1415391927 + ... + 1415670417.

It is an arithmetic number, because the mean of its divisors is an integer number (10475485491744).

Almost surely, 2^{394212691621452} is an apocalyptic number.

It is an amenable number.

394212691621452 is an abundant number, since it is smaller than the sum of its proper divisors (611433915585972).

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

394212691621452 is a wasteful number, since it uses less digits than its factorization.

394212691621452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301939 (or 301937 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 57.

The spelling of 394212691621452 in words is "three hundred ninety-four trillion, two hundred twelve billion, six hundred ninety-one million, six hundred twenty-one thousand, four hundred fifty-two".