400620061 has 8 divisors (see below), whose sum is σ = 415006200. Its totient is φ = 386453760.

The previous prime is 400620047. The next prime is 400620097. The reversal of 400620061 is 160026004.

It can be written as a sum of positive squares in 4 ways, for example, as 219961 + 400400100 = 469^2 + 20010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400620061 - 2¹⁵ = 400587293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400620041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51246 + ... + 58543.

It is an arithmetic number, because the mean of its divisors is an integer number (51875775).

Almost surely, 2^400620061 is an apocalyptic number.

400620061 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

400620061 is a deficient number, since it is larger than the sum of its proper divisors (14386139).

400620061 is a wasteful number, since it uses less digits than its factorization.

400620061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109919.

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

The square root of 400620061 is about 20015.4955222198. The cubic root of 400620061 is about 737.1868238814.

Adding to 400620061 its reverse (160026004), we get a palindrome (560646065).

The spelling of 400620061 in words is "four hundred million, six hundred twenty thousand, sixty-one".