400030960 has 40 divisors (see below), whose sum is σ = 1062940896. Its totient is φ = 137153280.

The previous prime is 400030951. The next prime is 400030963. The reversal of 400030960 is 69030004.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400030963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356611 + ... + 357730.

Almost surely, 2^400030960 is an apocalyptic number.

400030960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400030960 is an abundant number, since it is smaller than the sum of its proper divisors (662909936).

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

400030960 is a wasteful number, since it uses less digits than its factorization.

400030960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714361 (or 714355 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 400030960 is about 20000.7739850237. The cubic root of 400030960 is about 736.8253088402.

Adding to 400030960 its reverse (69030004), we get a palindrome (469060964).

The spelling of 400030960 in words is "four hundred million, thirty thousand, nine hundred sixty".