620291406 has 32 divisors (see below), whose sum is σ = 1419010560. Its totient is φ = 177075936.

The previous prime is 620291401. The next prime is 620291407. The reversal of 620291406 is 604192026.

It is a super-2 number, since 2×620291406² = 769522856714913672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620291401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49800 + ... + 60996.

It is an arithmetic number, because the mean of its divisors is an integer number (44344080).

Almost surely, 2^620291406 is an apocalyptic number.

620291406 is an abundant number, since it is smaller than the sum of its proper divisors (798719154).

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

620291406 is a wasteful number, since it uses less digits than its factorization.

620291406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12528.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 620291406 is about 24905.6500818589. The cubic root of 620291406 is about 852.8354701184.

The spelling of 620291406 in words is "six hundred twenty million, two hundred ninety-one thousand, four hundred six".