690143628 has 48 divisors (see below), whose sum is σ = 1707078240. Its totient is φ = 216259584.

The previous prime is 690143621. The next prime is 690143639. The reversal of 690143628 is 826341096.

It is not an unprimeable number, because it can be changed into a prime (690143621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246058 + ... + 248846.

It is an arithmetic number, because the mean of its divisors is an integer number (35564130).

Almost surely, 2^690143628 is an apocalyptic number.

690143628 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

690143628 is an abundant number, since it is smaller than the sum of its proper divisors (1016934612).

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

690143628 is a wasteful number, since it uses less digits than its factorization.

690143628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 690143628 is about 26270.5848431283. The cubic root of 690143628 is about 883.7169008781.

The spelling of 690143628 in words is "six hundred ninety million, one hundred forty-three thousand, six hundred twenty-eight".