400733028 has 96 divisors (see below), whose sum is σ = 1100736000. Its totient is φ = 125724960.

The previous prime is 400732999. The next prime is 400733029. The reversal of 400733028 is 820337004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 400732992 and 400733010.

It is not an unprimeable number, because it can be changed into a prime (400733029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366763 + ... + 367853.

It is an arithmetic number, because the mean of its divisors is an integer number (11466000).

Almost surely, 2^400733028 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 400733028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550368000).

400733028 is an abundant number, since it is smaller than the sum of its proper divisors (700002972).

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

400733028 is a wasteful number, since it uses less digits than its factorization.

400733028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 400733028 is about 20018.3173119021. The cubic root of 400733028 is about 737.2561081117.

The spelling of 400733028 in words is "four hundred million, seven hundred thirty-three thousand, twenty-eight".