87729456 has 20 divisors (see below), whose sum is σ = 226634552. Its totient is φ = 29243136.

The previous prime is 87729451. The next prime is 87729461. The reversal of 87729456 is 65492778.

It is an interprime number because it is at equal distance from previous prime (87729451) and next prime (87729461).

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1827697 = 87729456 / (8 + 7 + 7 + 2 + 9 + 4 + 5 + 6).

It is not an unprimeable number, because it can be changed into a prime (87729451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913801 + ... + 913896.

Almost surely, 2^87729456 is an apocalyptic number.

It is an amenable number.

87729456 is an abundant number, since it is smaller than the sum of its proper divisors (138905096).

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

87729456 is a wasteful number, since it uses less digits than its factorization.

87729456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827708 (or 1827702 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 87729456 is about 9366.4003758114. The cubic root of 87729456 is about 444.3397286261.

The spelling of 87729456 in words is "eighty-seven million, seven hundred twenty-nine thousand, four hundred fifty-six".