400000048 has 20 divisors (see below), whose sum is σ = 885714640. Its totient is φ = 171428544.

The previous prime is 400000043. The next prime is 400000049. The reversal of 400000048 is 840000004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 399999977 and 400000040.

It is not an unprimeable number, because it can be changed into a prime (400000043) 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, 1785603 + ... + 1785826.

It is an arithmetic number, because the mean of its divisors is an integer number (44285732).

Almost surely, 2^400000048 is an apocalyptic number.

It is an amenable number.

400000048 is an abundant number, since it is smaller than the sum of its proper divisors (485714592).

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

400000048 is a wasteful number, since it uses less digits than its factorization.

400000048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571444 (or 3571438 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400000048 is about 20000.0012000000. The cubic root of 400000048 is about 736.8063292003.

The spelling of 400000048 in words is "four hundred million, forty-eight", and thus it is an aban number.