400500036 has 72 divisors (see below), whose sum is σ = 1048879104. Its totient is φ = 128718720.

The previous prime is 400500029. The next prime is 400500053. The reversal of 400500036 is 630005004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 400499991 and 400500018.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426960 + ... + 427896.

Almost surely, 2^400500036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400500036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524439552).

400500036 is an abundant number, since it is smaller than the sum of its proper divisors (648379068).

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

400500036 is a wasteful number, since it uses less digits than its factorization.

400500036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 400500036 is about 20012.4969956275. The cubic root of 400500036 is about 737.1131966097.

The spelling of 400500036 in words is "four hundred million, five hundred thousand, thirty-six".