8219493400 has 48 divisors (see below), whose sum is σ = 19372141800. Its totient is φ = 3242753280.

The previous prime is 8219493397. The next prime is 8219493407. The reversal of 8219493400 is 43949128.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219493407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266890 + ... + 296089.

Almost surely, 2^8219493400 is an apocalyptic number.

It is an amenable number.

8219493400 is an abundant number, since it is smaller than the sum of its proper divisors (11152648400).

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

8219493400 is a wasteful number, since it uses less digits than its factorization.

8219493400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563068 (or 563059 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 8219493400 is about 90661.4217845716. The cubic root of 8219493400 is about 2018.1263382913.

The spelling of 8219493400 in words is "eight billion, two hundred nineteen million, four hundred ninety-three thousand, four hundred".