1020738890 has 8 divisors (see below), whose sum is σ = 1837330020. Its totient is φ = 408295552.

The previous prime is 1020738883. The next prime is 1020738937. The reversal of 1020738890 is 988370201.

It can be written as a sum of positive squares in 2 ways, for example, as 1020738601 + 289 = 31949^2 + 17^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51036935 + ... + 51036954.

Almost surely, 2^1020738890 is an apocalyptic number.

1020738890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020738890 is a deficient number, since it is larger than the sum of its proper divisors (816591130).

1020738890 is a wasteful number, since it uses less digits than its factorization.

1020738890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102073896.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1020738890 is about 31949.0045228329. The cubic root of 1020738890 is about 1006.8657173793.

The spelling of 1020738890 in words is "one billion, twenty million, seven hundred thirty-eight thousand, eight hundred ninety".