28742203480 has 32 divisors (see below), whose sum is σ = 64675713600. Its totient is φ = 11495858176.

The previous prime is 28742203463. The next prime is 28742203489. The reversal of 28742203480 is 8430224782.

It is a happy number.

It is a super-2 number, since 2×28742203480² (a number of 22 digits) contains 22 as substring.

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 (28742203489) 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, 557016 + ... + 606424.

It is an arithmetic number, because the mean of its divisors is an integer number (2021116050).

Almost surely, 2^28742203480 is an apocalyptic number.

28742203480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28742203480 is an abundant number, since it is smaller than the sum of its proper divisors (35933510120).

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

28742203480 is a wasteful number, since it uses less digits than its factorization.

28742203480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63963 (or 63959 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 40.

The spelling of 28742203480 in words is "twenty-eight billion, seven hundred forty-two million, two hundred three thousand, four hundred eighty".