400061620 has 48 divisors (see below), whose sum is σ = 963970560. Its totient is φ = 136617984.

The previous prime is 400061617. The next prime is 400061633. The reversal of 400061620 is 26160004.

It is a congruent number.

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, 30421 + ... + 41539.

It is an arithmetic number, because the mean of its divisors is an integer number (20082720).

Almost surely, 2^400061620 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 400061620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481985280).

400061620 is an abundant number, since it is smaller than the sum of its proper divisors (563908940).

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

400061620 is a wasteful number, since it uses less digits than its factorization.

400061620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11392 (or 11390 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 400061620 is about 20001.5404406761. The cubic root of 400061620 is about 736.8441327889.

The spelling of 400061620 in words is "four hundred million, sixty-one thousand, six hundred twenty".