1019690450 has 24 divisors (see below), whose sum is σ = 1903860288. Its totient is φ = 406320080.

The previous prime is 1019690449. The next prime is 1019690473. The reversal of 1019690450 is 540969101.

It is a super-2 number, since 2×1019690450² = 2079537227642405000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1019690450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25622 + ... + 51921.

It is an arithmetic number, because the mean of its divisors is an integer number (79327512).

Almost surely, 2^1019690450 is an apocalyptic number.

1019690450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1019690450 is a deficient number, since it is larger than the sum of its proper divisors (884169838).

1019690450 is a wasteful number, since it uses less digits than its factorization.

1019690450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77818 (or 77813 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1019690450 is about 31932.5922843730. The cubic root of 1019690450 is about 1006.5208691723.

The spelling of 1019690450 in words is "one billion, nineteen million, six hundred ninety thousand, four hundred fifty".