842621388 has 48 divisors (see below), whose sum is σ = 2379170304. Its totient is φ = 226586880.

The previous prime is 842621369. The next prime is 842621393. The reversal of 842621388 is 883126248.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293608 + ... + 296463.

It is an arithmetic number, because the mean of its divisors is an integer number (49566048).

Almost surely, 2^842621388 is an apocalyptic number.

It is an amenable number.

842621388 is an abundant number, since it is smaller than the sum of its proper divisors (1536548916).

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

842621388 is a wasteful number, since it uses less digits than its factorization.

842621388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590102 (or 590100 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 842621388 is about 29027.9415046951. The cubic root of 842621388 is about 944.5192773472.

The spelling of 842621388 in words is "eight hundred forty-two million, six hundred twenty-one thousand, three hundred eighty-eight".