8472769840 has 40 divisors (see below), whose sum is σ = 19705042368. Its totient is φ = 3388101120.

The previous prime is 8472769787. The next prime is 8472769841. The reversal of 8472769840 is 489672748.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×8472769840² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8472769841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292825 + ... + 320455.

Almost surely, 2^8472769840 is an apocalyptic number.

8472769840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8472769840 is an abundant number, since it is smaller than the sum of its proper divisors (11232272528).

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

8472769840 is a wasteful number, since it uses less digits than its factorization.

8472769840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31477 (or 31471 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The square root of 8472769840 is about 92047.6498342027. The cubic root of 8472769840 is about 2038.6459231478.

The spelling of 8472769840 in words is "eight billion, four hundred seventy-two million, seven hundred sixty-nine thousand, eight hundred forty".