400153530 has 32 divisors (see below), whose sum is σ = 1097564544. Its totient is φ = 91463616.

The previous prime is 400153519. The next prime is 400153561. The reversal of 400153530 is 35351004.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 400153497 and 400153506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952537 + ... + 952956.

It is an arithmetic number, because the mean of its divisors is an integer number (34298892).

Almost surely, 2^400153530 is an apocalyptic number.

400153530 is an abundant number, since it is smaller than the sum of its proper divisors (697411014).

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

400153530 is a wasteful number, since it uses less digits than its factorization.

400153530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905510.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 400153530 is about 20003.8378817666. The cubic root of 400153530 is about 736.9005558958.

The spelling of 400153530 in words is "four hundred million, one hundred fifty-three thousand, five hundred thirty".