15878448 has 60 divisors (see below), whose sum is σ = 45883968. Its totient is φ = 5120640.

The previous prime is 15878419. The next prime is 15878477. The reversal of 15878448 is 84487851.

It is an interprime number because it is at equal distance from previous prime (15878419) and next prime (15878477).

It is a super-2 number, since 2×15878448² = 504250221777408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2686 + ... + 6242.

Almost surely, 2^15878448 is an apocalyptic number.

15878448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15878448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22941984).

15878448 is an abundant number, since it is smaller than the sum of its proper divisors (30005520).

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

15878448 is a wasteful number, since it uses less digits than its factorization.

15878448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602 (or 3593 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 15878448 is about 3984.7770326582. Note that the first 3 decimals coincide. The cubic root of 15878448 is about 251.3444792076.

It can be divided in two parts, 158 and 78448, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 15878448 in words is "fifteen million, eight hundred seventy-eight thousand, four hundred forty-eight".