990429406 has 16 divisors (see below), whose sum is σ = 1533662064. Its totient is φ = 479412864.

The previous prime is 990429403. The next prime is 990429409. The reversal of 990429406 is 604924099.

It is an interprime number because it is at equal distance from previous prime (990429403) and next prime (990429409).

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990429403) 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, 41241 + ... + 60676.

It is an arithmetic number, because the mean of its divisors is an integer number (95853879).

Almost surely, 2^990429406 is an apocalyptic number.

990429406 is a deficient number, since it is larger than the sum of its proper divisors (543232658).

990429406 is a wasteful number, since it uses less digits than its factorization.

990429406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102075.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 990429406 is about 31471.0884146068. The cubic root of 990429406 is about 996.7995701760.

The spelling of 990429406 in words is "nine hundred ninety million, four hundred twenty-nine thousand, four hundred six".