1678224690 has 32 divisors (see below), whose sum is σ = 4475266560. Its totient is φ = 447526512.

The previous prime is 1678224689. The next prime is 1678224707. The reversal of 1678224690 is 964228761.

It is a happy number.

1678224690 is a `hidden beast` number, since 167 + 8 + 22 + 469 + 0 = 666.

It is a super-2 number, since 2×1678224690² = 5632876220251192200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3107554 + ... + 3108093.

It is an arithmetic number, because the mean of its divisors is an integer number (139852080).

Almost surely, 2^1678224690 is an apocalyptic number.

1678224690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1678224690 is an abundant number, since it is smaller than the sum of its proper divisors (2797041870).

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

1678224690 is a wasteful number, since it uses less digits than its factorization.

1678224690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215663 (or 6215657 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1678224690 is about 40966.1407750352. The cubic root of 1678224690 is about 1188.3655007410.

The spelling of 1678224690 in words is "one billion, six hundred seventy-eight million, two hundred twenty-four thousand, six hundred ninety".