400155069 has 8 divisors (see below), whose sum is σ = 538526880. Its totient is φ = 264276656.

The previous prime is 400155053. The next prime is 400155083. The reversal of 400155069 is 960551004.

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 400155069 - 2⁴ = 400155053 is a prime.

It is a super-2 number, since 2×400155069² = 320248158492789522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400155269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622974 + ... + 623615.

It is an arithmetic number, because the mean of its divisors is an integer number (67315860).

Almost surely, 2^400155069 is an apocalyptic number.

It is an amenable number.

400155069 is a deficient number, since it is larger than the sum of its proper divisors (138371811).

400155069 is a wasteful number, since it uses less digits than its factorization.

400155069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246699.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 400155069 is about 20003.8763493479. The cubic root of 400155069 is about 736.9015006070.

The spelling of 400155069 in words is "four hundred million, one hundred fifty-five thousand, sixty-nine".